| abstract |
A compound of the formula, wherein R1 is an optionally substituted hydrocarbon, amino or heterocyclic group; R2 is H or an optionally substituted hydrocarbon group; R3 is H or an optionally substituted hydrocarbon or heterocyclic group; X is CHR4, NR4, O or S in which R4 is H or an optionally substituted hydrocarbon group; Y is C, CH or N; ring A is optionally substituted 5- to 7-membered ring; ring B is an optionally substituted benzene ring; and m is 1 to 4, or a salt thereof, a process for producing it, an intermediate for the production and a pharmaceutical composition comprising it are provided. |